High-early-strength polycarboxylate water reducer as well as synthesis method and application method of polycarboxylate water reducer

Abstract

The invention belongs to the technical field of building materials, and in particular relates to a polycarboxylate water reducer with high water-reducing rate and good early-strength effect as well as a synthesis method and an application method of the polycarboxylate water reducer. The synthetic raw materials for the water reducer comprise isobutylene alcohol polyoxyethylene ether (HPEG), acrylic acid (AA), 2-acrylamide-2-methyl propane sulfonic acid (AMPS), hydrogen peroxide (H2O2), vitamin C (VC), thioglycollic acid (TGA), a base and water. The synthesis method comprises the following steps of mixing AA and AMPS with water to prepare a 45%-65% of solution compound A; then, mixing TGA and VC with water to prepare a 2%-5% of solution B material; mixing HPEG with water to prepare a 45%-65% of HPEG aqueous solution, adding the HPEG aqueous solution to a reaction kettle and heating under stirring so that complete dissolution is achieved, adding H2O2 when the temperature is raised to (40-45) DEG C, and dropwise adding the solution A material and the solution B material, wherein the adding time of the solution A material is controlled at 2-3 hours and the adding time of the solution B material A is controlled at 2-3 hours; after the dropwise addition is completed, maintaining the temperature for 1-2 hours and adjusting pH to be 6-8 after the reactant is cooled to obtain the desired product. According to the invention, the process is simple, the product has stable performance and good market prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an early-strength polycarboxylate water reducer, a synthesis process and a use method. Background technique [0002] As the third generation of water reducing agent, polycarboxylate water reducing agent is highly praised by the domestic and foreign water reducing agent industry and concrete industry for its high water reducing rate, good slump retention, low shrinkage rate and environmental protection. And put a lot of energy into research on its mechanism of action, the relationship between molecular structure and performance, performance improvement, variety serialization and application technology. However, my country started late in the research of polycarboxylate superplasticizers, and the variety of polycarboxylate superplasticizers on the market cannot meet the diverse needs of engineering. At present, the implementation of housing industrialization...

AI Technical Summary

Problems solved by technology

Common polycarboxylate-based water reducers and early-strength components have problems such as large dosage and poor compatibility between components, making it difficult to popularize and apply

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